Datasheet AD7934-6 (Analog Devices) - 3

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AD7934-6 TABLE OF CONTENTS
Features .. 1 ADC Transfer Function... 15 Functional Block Diagram .. 1 Typical Connection Diagram ... 16 General Description ... 1 Analog Input Structure.. 16 Product Highlights ... 1 Analog Input Configurations ... 17 Revision History ... 2 Analog Input Selection .. 19 Specifications... 3 Reference ... 20 Timing Specifications .. 5 Parallel Interface... 21 Absolute Maximum Ratings.. 6 Power Modes of Operation ... 24 ESD Caution.. 6 Power vs. Throughput Rate... 25 Pin Configuration and Function Descriptions... 7 Microprocessor Interfacing... 25 Typical Performance Characteristics ... 9 Application Hints ... 27 Terminology .. 11 Grounding and Layout .. 27 Control Register.. 13 Evaluating the AD7934-6 Performance .. 27 Sequencer Operation ... 14 Outline Dimensions ... 28 Circuit Information .. 15 Ordering Guide .. 28 Converter Operation.. 15
REVISION HISTORY 2/07—Rev. A to Rev. B
Updated Format..Universal Changes to Figure 13.. 10 Changes to Sequencer Operation Section... 14 Changes to Figure 34.. 21
10/05—Rev. 0 to Rev. A
Changes to Product Highlights... 1 Inserted Table 1... 1 Changes to Specifications .. 3 Changes to Timing Specifications .. 5 Changes to Pin Function Descriptions.. 7 Added Writing to the Control Register to Program the Sequencer Section.. 14 Changes to the Analog Inputs Section... 17 Changes to the Grounding and Layout Section ... 27
1/05—Revision 0: Initial Version
Rev. B | Page 2 of 28 Document Outline FEATURES FUNCTIONAL BLOCK DIAGRAM GENERAL DESCRIPTION PRODUCT HIGHLIGHTS REVISION HISTORY SPECIFICATIONS TIMING SPECIFICATIONS ABSOLUTE MAXIMUM RATINGS ESD CAUTION PIN CONFIGURATION AND FUNCTION DESCRIPTIONS TYPICAL PERFORMANCE CHARACTERISTICS TERMINOLOGY CONTROL REGISTER SEQUENCER OPERATION Writing to the Control Register to Program the Sequencer CIRCUIT INFORMATION CONVERTER OPERATION ADC TRANSFER FUNCTION TYPICAL CONNECTION DIAGRAM ANALOG INPUT STRUCTURE ANALOG INPUT CONFIGURATIONS Single-Ended Mode Differential Mode Driving Differential Inputs Using an Op Amp Pair Pseudo Differential Mode ANALOG INPUT SELECTION Traditional Multichannel Operation (SEQ0 = SEQ1 = 0) Using the Sequencer: Consecutive Sequence (SEQ0 = SEQ1 = 1) REFERENCE Digital Inputs VDRIVE Input PARALLEL INTERFACE Reading Data from the AD7934-6 Writing Data to the AD7934-6 POWER MODES OF OPERATION Normal Mode (PM1 = PM0 = 0) Autoshutdown Mode (PM1 = 0; PM0 = 1) Autostandby Mode (PM1 = 1; PM0 = 0) Full Shutdown Mode (PM1 = 1; PM0 = 1) POWER vs. THROUGHPUT RATE MICROPROCESSOR INTERFACING AD7934-6 to ADSP-21xx Interface AD7934-6 to ADSP-21065L Interface AD7934-6 to TMS32020, TMS320C25, and TMS320C5x Interface AD7934-6 to 80C186 Interface APPLICATION HINTS GROUNDING AND LAYOUT EVALUATING THE AD7934-6 PERFORMANCE OUTLINE DIMENSIONS ORDERING GUIDE